Question

СРОЧНО! Помогите пожалуйста пжпжпжпжпжпжпжпж​

Answer 1

Ответ:

-8/15

Объяснение:

1) 3/7 * 1 13/15 = 3/7 * 28/15 = 1/1 * 4/5 = 4/5

2) 2 4/9 : 11/12 = 22/9 * 12/11 = 2/3 * 4/1 = 8/3 = 2 2/3

3) 1 1/3 + 4/5 - 2 2/3 = 1 5/15 + 12/15 - 2 10/15 = 1 17/15 - 2 10/15 = 2 2/15 - 2 10/15 = -8/15

Answer 2

$\displaystyle\bf\\1)\\\\\frac{3}{7} \cdot1\frac{13}{15} =\frac{3}{7} \cdot\frac{28}{15}=\frac{4}{5}\\\\\\2)\\\\2\frac{4}{9} :\frac{11}{12} =\frac{22}{9} :\frac{11}{12} =\frac{22}{9} \cdot\frac{12}{11} =\frac{8}{3}=2\frac{2}{3} \\\\\\3)\\\\1\frac{1}{3} -2\frac{2}{3} =-\Big(2\frac{2}{3} -1\frac{1}{3}\Big)=-1\frac{1}{3} \\\\\\4)\\\\-1\frac{1}{3}+\frac{4}{5} =-\frac{4}{3}+\frac{4}{5} =\frac{-20+12}{15} =-\frac{8}{15}$